Norman Castles in Ireland: How to Read Them
Within a generation of landing, the Normans had put a castle at almost every crossing of every river that mattered.
When people say “Norman castles in Ireland” they usually picture a grey stone tower. The truth is that the first castles the Normans built here were mostly made of earth and timber, and the stone came later, once a conquest had turned into a lordship. Knowing the difference turns a ruined wall in a field into something you can read.
The timeline in five dates
- 1169. Anglo-Norman mercenaries land at Bannow Bay in May, invited by Diarmait mac Murchada, the deposed King of Leinster.
- 1170. Richard de Clare, called Strongbow, arrives with a larger force and takes Waterford and Dublin.
- 1171. Henry II lands at Waterford in October, and grants Leinster to Strongbow as a fief.
- 1177. Henry names his son John “Lord of Ireland”, and the Norman-held territory becomes the Lordship of Ireland.
- 1185. John’s first expedition to Ireland. As prince, he was directly involved in building castles at Ardfinnan and Lismore.
(Source: Wikipedia’s account of the Norman invasion of Ireland.) Castles were central to the feudal system the Normans brought: a lord was granted land and built a castle to hold it, and a settlement usually grew up alongside. The record shows the strategy working both ways. Irish forces destroyed Norman castles at Trim and Duleek in 1174 and at Slane in 1176.
Stage one: the motte and the ringwork
A motte-and-bailey has two parts: the motte, a raised earth mound topped by a keep, and the bailey, a walled courtyard surrounded by a ditch and palisade. They were relatively cheap to build and still militarily strong, and in Ireland most of the Normans’ early castles took this form. A modern estimate puts the number of surviving motte-and-bailey sites in Ireland at between 350 and 450, though identifying earthworks is sometimes disputed.
A ringwork is the same idea without the mound: a ditch and bank around a circular or oval enclosure. Trim is the textbook case. The castle there began as a large ringwork, repaired or rebuilt in 1173, and the stone keep later rose on the same site.
For an unglamorous but real example in Tipperary, look at Knockgraffon, beside the Suir. Wikipedia dates its motte to 1192, when “the English of Leinster” built a large earthen mound surrounded by a wooden fence on the sacred hill of Rath Fionn. The Irish name, Cnoc Rath Fionn, means “hill of the fort of Fionn”.
Stage two: the stone keep
Stone gradually replaced wood. Where a motte could not bear the weight of a stone tower, builders put the keep on fresh ground instead. Stone keeps came to Ireland in the 1170s, after the Normans took eastern Ireland.
The finest surviving example is Trim Castle in County Meath, which Heritage Ireland describes as the largest Anglo-Norman fortification in Ireland. Hugh de Lacy and his successors took about 30 years to build it. Its three-storey keep is cruciform with twenty corners, which is unusual for a Norman keep, and was defended by a ditch, curtain wall and moat. The keep was built in stages, starting around 1174 under Hugh, with further work in 1196 and 1201–5 under his son Walter.
Round keeps appear too. Nenagh Castle in County Tipperary has a circular keep more than 30 metres high, built around 1200 and finished about 1220 by the Butler family, described as one of the finest of its kind in Ireland.
Stage three: the enclosure castle and the curtain wall
By the 13th century the emphasis moves from a single strong tower to a ring of walls and towers around a courtyard, with gatehouses designed to be the strongest point. Carrickfergus, built from 1177 by John de Courcy, grew this way: an inner ward first, then a gatehouse and east tower finished around 1250. Cahir, on its rock in the Suir, belongs to the same tradition, though it is not purely Norman: it was built in the 13th century and changed hands and fashions many times.
How Ardfinnan fits
Ardfinnan Castle is a Norman castle from the very first generation. It was built in 1185 by Prince John, during that same first expedition, on a rocky rise above a ford on the River Suir. Its first governor was Maurice de Prendergast. The story of 1185 is also a cautionary one: later that year, Irish kings captured the castle after a feigned retreat drew out its garrison.
The Knights Templar probably managed the site and built its round tower in the late 12th or early 13th century; the Hospitallers held it after the Templars were dissolved in 1312. The castle was besieged by Henry Ireton in February 1650, slighted after surrender, and remade as a country house around 1846. Ardfinnan is a private residence and not open to visitors, which makes it a good reminder that “reading” a Norman castle means looking at all its later lives too.
What to look for on a visit
- A big grassy mound next to a river or ford. That is likely to be a motte, and the water was the reason the Normans chose the spot.
- A flat enclosed platform. Often a bailey, now often a field or churchyard.
- Thick walls, small windows, a stair in the wall. A stone keep.
- A circular tower. A round keep or later flanking tower; Nenagh and Ardfinnan both have them.
- Later windows cut through old walls. Evidence that a medieval fortress became a house, as at Ardfinnan.
To see Norman building at its best, begin with our list of the best castles in Ireland, or browse the full hub of castles of Ireland.
